As legendary investor Warren Buffett prepares to step down as CEO of Berkshire Hathaway at the end of the year, more leadership changes are taking place—Marc D. Hamburg, the longtime SVP and CFO, is preparing to retire.
Hamburg, who joined Berkshire in 1987, will retire on June 1, 2027, after 40 years of service, the firm announced on Monday. Charles C. Chang will succeed him as SVP and CFO, effective June 1, 2026. Chang is currently SVP, CFO, and director of Berkshire Hathaway Energy. In his new role, he will be based in Omaha and will work with Hamburg during a transition period.
“Marc has been indispensable to Berkshire and to me,” Buffett said in a statement regarding Hamburg’s retirement. “His integrity and judgment are priceless. He has done more for this company than many of our shareholders will ever know. His impact has been extraordinary.”
Chang, 56, joined Berkshire Hathaway Energy in October 2024. Before that, he was a partner in PricewaterhouseCoopers LLP’s energy practice, working with large multinational energy companies. He has 34 years of experience in accounting, U.S. Securities and Exchange Commission reporting, mergers and acquisitions, and sustainability.
